Re:Well, this seems pretty obvious. (Score 5, Interesting)

What does XenSource get out of this deal ? One of the following:

• Cash
• Publicity (which helps an ailing company that recently fired all its executives and has struggled to make a dent on the market even after a full year)
• Leverage when pushing their VMI interface into linux kernels, over VMwares interface
• More importantly, behind the scenes deal to add a VMI interface into Windows, along with the licensing agreement. Someone else qutoed from the Xen website that "A port of Windows XP was developed for an earlier version of Xen, but is not available for release due to licence restrictions". To get around antitrust issues, MS will make the interface public eventually, but this wont give VMware enough time to hook into this.